Computing-machine.



C. SGHALLER.

COMPUTING MACHINE.

APPLlCATION FILED NOV. 15. 1915.

1,220,008. Patented M01220, 917

UNITED STATES PATENT OFFICE.

CARL SCHALLER, 0F BRUNSWICK GERMANY, ASSIGNOR TO GRII IME, NA'IFALIS &(10.,

GGMMANDITGESELLSCHAFT AU)? ACTIEN,

TION OF GERMANY.

or eeenswrox, GERMANY, A coupons CGlViIUTINGr-MACHINE.

Specification of Letters Patent Patented Mar. 26, 1917.

Q '0 all :0 hem it may cmwern lie it known that 1 {Linn bvenixmuu,worlm'uister, a. citizen of the Duchy of Brunswick, lill'l'ipli'e of(lei-many, residing at Brunswick, Germany, have invented certain new anduseful Improveuuuits in ComputiugMachines, of which the following; aspecification.

My invention relates to computing or calculating machines. The object ofmy invention and the means by which I attain the ohject, will he morereadily understood hy reference to the ilcfifllnijmllylilfi drawing inwhich i have illustrated. in a sectional side elevation, a machine oi?the type to which my invention is particularly applicahie.

The illustrated computing.machinc is of teh type in which numbers anditems "en he set up by means of disks 0 revolubly mounted upon the shaftZ? and provided with the tongue-like handles 11. The disks 6 l we camgrooves Z into which project ateral extensions m of the teeth a whichare slidahly carried in disks (5 fixedly mounted upon the shaft 7:. Whenthe handle i of any disk 6 is moved a certain extent a correspondingnumber of teeth at will he caused. to move radially outward so es toproject from. the circumference of the disk a which is associ ated withthe disk 0 thus operated When the main operating crank 0 is turned, theteeth it prm'iously set up will then transmit to the counting mechanism9 through tic intermediate wheel 32, a movement corresponding in itsextent to the nun'ihers of teeth it moved outward and projecting fromthe disk at. lVIechines of this type are frequently furnished with anindicating mechanism or i'em registei." g on which the set up nuniihersand items appear 'isibie to the eye, the numbers and items being trans-:t'erred to the indicating mechanism from the cam disks (2 throughintermediute wheels it.

in machines of this type, the 110088 't of disconnecting the indicatingmec A oregister after the numbers and n up by means oi the handles 2'and 'g'lreyionsly to the starting oi the main operating lever 0, ii analteration in the numher set up in the register is to he prevented,constitutes e drawhecli'.

It is the object of my invention to over come this drawback by providinga device in which the actuating means for the indicating register is ofsuch a charecter that during the rotation the setting-up wheel (6ett'ected hy the movement of operating handle, no action'is exerted uponsaid register so that the number set up therein remains unchanged.

For this purpose the scttinpyup wheel a which carries the slidnble teethin but is stationary while the teeth areheine; set up, is provided withan actuatingmember c, d, which receives its motion from the cam disk 0and transmits the received mot on to the register either directly orthrough an intermediate operating member, as shown in the constructionillustrated. As a result of this arrangement, the actuating member 0,(Z, performs an actuating movement only when the SChtlIiQ-UD wheel onwhich said netuating member is l.eV0lli.l3l mounted, is stationary andthe cam dis; e is moving; relatively thereto; but the actuating memher6*, ch does not transmit any motion to the indicator 9' when thesetting-up wheel a and the cam disk c which otherwise produees theactuating movement, are both revolving simultaneously andin the samedirection.

in the construction illustrated, the setting-up wheel a carrying theadjijistalole teeth 11., is provided with a pivot 71 on which theactuating member is rotstahly mounted, this actuating member being hereshown as comprising a star wheel 0, having rigidly connected thereto, atoothed gear wheel a? which meshes with the internal gear teeth; of thecam disk 6. The disposition of the star wheel is such that the sameadvances the intermediate wheel it operating the indicating mechanism orregister 9 when the cam disk 6 is rotating the star wheel 6 by means ofthe curved rack formed by" end the p nion cl. But this Q; I tation ofthe star wheel will tame place when the setting-up wheel a is stironery,

and the cam-disk c is rotating; relatively thereto. The teeth of thestar wheel 0 are always out of engagement with the teeth oi theintermediate wheel h when the cam disk is in the position correspondingto zero or to any other of those figures or digits that can be set up bymeans of the cam disk er From this it follows-that tee

